The influence of ATP treatment on energy dissipation system in postharvest longan fruit during senescence

2020 ◽  
Vol 164 ◽  
pp. 111154
Author(s):  
Meiling Li ◽  
Qiuping Zheng ◽  
Hetong Lin ◽  
Mengshi Lin ◽  
Yihui Chen ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Energy Dissipation System ◽  
Dissipation System

scholarly journals Low-Cyclic Loading Tests of Self-Centering Variable Friction (SCVF) Brace

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Qingguang He ◽  
Yanxia Bai ◽  
Weike Wu ◽  
Yongfeng Du
Keyword(s):  
Finite Element ◽  
Friction Coefficient ◽  
Energy Dissipation ◽  
Cyclic Loading ◽  
Variable Friction ◽  
Loading Tests ◽  
Low Cyclic Loading ◽  
Energy Dissipation System ◽  
Cyclic Loading Tests ◽  
Dissipation System

A novel assembled self-centering variable friction (SCVF) brace is proposed which is composed of an energy dissipation system, a self-centering system, and a set of force transmission devices. The hysteretic characteristics and energy dissipation of the SCVF brace with various parameters from low-cyclic loading tests are presented. A finite element model was constructed and tested under simulated examination for comparative analysis. The results indicate that the brace shows an atypical flag-type hysteresis curve. The SCVF brace showed its stable self-centering ability and dissipation energy capacity within the permitted axial deformation under different spring and friction plates. A larger deflection of the friction plate will make the variable friction of this SCVF brace more obvious. A higher friction coefficient will make the energy dissipation capacity of the SCVF brace stronger, but the actual friction coefficient will be lower than the design value after repeated cycles. The results of the fatigue tests showed that the energy dissipation system formed by the ceramic fiber friction blocks and the friction steel plates in the SCVF brace has a certain stability. The finite element simulation results are essentially consistent with the obtained test results, which is conducive to the use of finite element software for calculation and structural analysis in actual engineering design.

Parameters Analysis of Bracing Structure with Friction Energy Dissipation System

2014 ◽  
Vol 541-542 ◽  
pp. 857-860
Author(s):  
Wei Zhou ◽  
Xiao Xu ◽  
Wen Xiu Hao
Keyword(s):  
Energy Dissipation ◽  
Efficient System ◽  
Building Model ◽  
Frame Building ◽  
Yield Displacement ◽  
Friction Energy ◽  
Parameters Analysis ◽  
Energy Dissipation System ◽  
Dissipation System ◽  
Rational Range

Friction energy dissipating bracing is the kind of efficient system in reducing seismic of buildings. The main parameters are bracing stiffness and yielding displacement of friction energy dissipating devices in this system, which are important to the design of reducing seismic systems. Five-story steel frame building model with friction energy dissipating bracing in each floor is established, whose dynamic response of structure is studied when the value of main parameters is changed. The results show that the displacement of structure are decreased obviously and the acceleration of structure is first decreased and then increased when the bracing stiffness and yield displacement of friction energy dissipating devices are increased. In addition, the rational range of parameters is suggested for the design of friction energy dissipation systems.

Cyclic behavior of seesaw energy dissipation system with steel slit dampers

2016 ◽  
Vol 117 ◽  
pp. 24-34 ◽  
Author(s):  
Hiroshi Tagawa ◽  
Teruaki Yamanishi ◽  
Akira Takaki ◽  
Ricky W.K. Chan
Keyword(s):  
Energy Dissipation ◽  
Cyclic Behavior ◽  
Energy Dissipation System ◽  
Dissipation System

scholarly journals Experimental Campaign of a Low-Cost and Replaceable System for Passive Energy Dissipation in Precast Concrete Structures

2020 ◽  
Vol 10 (4) ◽  
pp. 1213 ◽  
Author(s):  
Álvaro Mena ◽  
Jorge Franco ◽  
Daniel Miguel ◽  
Jesús Mínguez ◽  
Ana Carla Jiménez ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Structural Damage ◽  
Low Cost ◽  
Precast Concrete ◽  
Seismic Energy ◽  
Structural Wall ◽  
Residential Structures ◽  
Energy Dissipation System ◽  
Seismic Tests ◽  
Dissipation System

This research develops a new low-cost energy dissipation system, capable of being implemented in residential structures in developing countries with high seismic activity, in which the current solutions are not economically viable. These residential structures are entirely made of precast concrete elements (foundations, walls, and slabs). A solution is developed that consists of a new connection between a precast foundation and a structural wall, which is capable of dissipating almost all the seismic energy, and therfore protecting the rest of the building from structural damage. To validate the solution, a testing campaign is carried out, including a first set of “pushover” tests on isolated structural walls, a second set of “pushover” tests on structural frames, and a final set of seismic tests on a real-scale three-storey building. For the first and second set of tests, ductility is analyzed in accordance with ACI 374.2R-13, while for the third one, the dynamic response to a reference earthquake is evaluated. The results reveal that the solution developed shows great ductility and no relevant damage is observed in the rest of the building, except in the low-cost energy dissipation system. Once an earthquake has finished, a precast building implemented with this low-cost energy dissipation system is capable of showing a structural performance level of “immediate occupancy” according to ACI 374.2R-13.

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